Portable milling machine having a spanner

Patent metadata

Field	Value
Publication number	US-10953529-B2
Application number	US-201816638057-A
Country	US
Kind code	B2
Filing date	Aug 8, 2018
Priority date	Aug 18, 2017
Publication date	Mar 23, 2021
Grant date	Mar 23, 2021

Abstract

Portable milling machine having a housing, a spindle and a clamping nut, which, as part of a tool holder, can be rotatably connected to the spindle and detached therefrom in order to clamp and unclamp a milling tool, and the portable milling machine having a spanner, which can be moved relative to the spindle axially between an engaged position and a disengaged position, the spanner interlockingly surrounding the clamping nut at least in portions in the circumferential direction in the engaged position and, when the spanner is in the disengaged position, the clamping nut being rotatable relative to the spanner, the spanner being connected to the housing of the portable milling machine for conjoint rotation such that, when the spanner is in the engaged position, the clamping nut can be connected to the spindle and detached therefrom by manually rotating the spindle.

First claim

What is claimed is:

1. A portable milling machine comprising:
a housing;
a spindle;
a tool holder having a clamping nut rotatably connectable to the spindle and detachable from the spindle in order to clamp and unclamp a milling tool;
a spanner movable relative to the spindle axially between an engaged position and a disengaged position, the spanner interlockingly surrounding the clamping nut at least in portions in the circumferential direction in the engaged position and, when the spanner is in the disengaged position, the clamping nut being rotatable relative to the spanner, the spanner being connected to the housing for conjoint rotation such that, when the spanner is in the engaged position, the clamping nut is connectable to the spindle and detachable from the spindle by manually rotating the spindle; and
a spindle key movable relative to the spindle axially between a blocked position and a released position, the spindle key interlockingly surrounding an interlocking connection element at least in portions in the circumferential direction in the blocked position, the interlocking connection element being formed on the spindle, the spindle being rotatable relative to the spindle key when the spindle key is in the released position.

2. The portable milling machine as recited in claim 1 wherein the interlocking connection element is a spindle nut.

3. The portable milling machine as recited in claim 1 wherein the spindle key in the blocked position is rotatable relative to the housing of the portable milling machine in order to allow the spindle to be rotated manually.

4. The portable milling machine as recited in claim 1 wherein the spanner and the spindle key are axially coupled such that movement into the engaged position takes place at the same time as movement into the blocked position or movement into the disengaged position takes place at the same time as movement into the released position.

5. The portable milling machine as recited in claim 1 wherein the portable milling machine has an upper sleeve and a lower sleeve on a tool side, the upper sleeve and the lower sleeve each having a manual operation surface and being arranged coaxially with the spindle.

6. The portable milling machine as recited in claim 5 wherein the upper sleeve is connected to the spindle key for conjoint rotation such that, when the spanner is in the engaged position and the spindle key is in the blocked position, the clamping nut is connectable to the spindle and detachable from the spindle by manually rotating the upper sleeve.

7. The portable milling machine as recited in claim 5 wherein the upper sleeve and the lower sleeve are mounted so as to be rotatable relative to one another.

8. The portable milling machine as recited in claim 7 wherein the upper sleeve is mounted in the lower sleeve and fixed in position relative to the lower sleeve in the axial direction.

9. The portable milling machine as recited in claim 5 wherein the spanner is rotatable relative to the spindle key or rotatable relative to both the upper sleeve and the lower sleeve.

10. The portable milling machine as recited in claim 5 wherein the upper sleeve and the spindle key are together mounted so as to be movable away from the housing in the axial direction or are connected to the housing for conjoint rotation.

11. The portable milling machine as recited in claim 5 further comprising an adjustment spring having a spring force, the engaged position or the blocked position assumable against the spring force.

12. The portable milling machine as recited in claim 11 wherein the adjustment spring, acting as a compression spring acting between the lower sleeve and the housing, is arranged inside the housing.

13. The portable milling machine as recited in claim 1 wherein the spindle key continuously surrounds the spindle.

14. A portable milling machine comprising:
a housing;
a spindle;
a tool holder having a clamping nut rotatably connectable to the spindle and detachable from the spindle in order to clamp and unclamp a milling tool; and
a spanner movable relative to the spindle axially between an engaged position and a disengaged position, the spanner interlockingly surrounding the clamping nut at least in portions in the circumferential direction in the engaged position and, when the spanner is in the disengaged position, the clamping nut being rotatable relative to the spanner, the spanner being connected to the housing for conjoint rotation such that, when the spanner is in the engaged position, the clamping nut is connectable to the spindle and detachable from the spindle by manually rotating the spindle;
wherein the portable milling machine has an upper sleeve and a lower sleeve on a tool side, the upper sleeve and the lower sleeve each having a manual operation surface and being arranged coaxially with the spindle; and
wherein the upper sleeve is connected to a spindle key for conjoint rotation such that, when the spanner is in the engaged position and the spindle key is in the blocked position, the clamping nut is connectable to the spindle and detachable from the spindle by manually rotating the upper sleeve.

15. A portable milling machine comprising:
a housing;
a spindle;
a tool holder having a clamping nut rotatably connectable to the spindle and detachable from the spindle in order to clamp and unclamp a milling tool; and
a spanner movable relative to the spindle axially between an engaged position and a disengaged position, the spanner interlockingly surrounding the clamping nut at least in portions in the circumferential direction in the engaged position and, when the spanner is in the disengaged position, the clamping nut being rotatable relative to the spanner, the spanner being connected to the housing for conjoint rotation such that, when the spanner is in the engaged position, the clamping nut is connectable to the spindle and detachable from the spindle by manually rotating the spindle;
wherein the portable milling machine has an upper sleeve and a lower sleeve on a tool side, the upper sleeve and the lower sleeve each having a manual operation surface and being arranged coaxially with the spindle; and
wherein the upper sleeve and the lower sleeve are mounted so as to be rotatable relative to one another.

Assignees

• Hilti Ag

Inventors

• Möglich Tobias

Classifications

• B23B2231/2081

  Keys, spanners or wrenches to operate the collet chuck · CPC title

• B23C1/20

  Portable devices or machines (details or components, e.g. casings, bodies, of portable power-driven tools not particularly related to the operation performed B25F5/00); Hand-driven devices or machines · CPC title

• B23B2270/60

  Prevention of rotation · CPC title

• Y10T409/309408

  with cutter holder · CPC title

• B23B31/06 Primary

  Features relating to the removal of tools; Accessories therefor · CPC title